Comparision of Valence Bond Theory and Molecular Orbital Theory
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CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313694 About the species \(\mathrm{O}_{2}^{+}, \mathrm{O}_{2}^{2-}, \mathrm{O}_{2}, \mathrm{O}_{2}^{-}\)which one of the following statements is correct?

1 \(\mathrm{O}_{2}^{+}\) has the highest bond order and largest bond length
2 \(\mathrm{O}_{2}\) has the highest bond order.
3 The bond order of \(\mathrm{O}_{2}\) equals the average bond orders of \(\mathrm{O}_{2}^{+}\)and \(\mathrm{O}_{2}^{-}\).
4 The sum of bond orders of these species is 1 .
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313695 Stability of the species \({\rm{L}}{{\rm{i}}_{\rm{2}}}{\rm{,Li}}_{\rm{2}}^{\rm{ - }}\,\,{\rm{and}}\,\,{\rm{Li}}_{\rm{2}}^{\rm{ + }}\) increases in the order of :

1 \({\rm{L}}{{\rm{i}}_{\rm{2}}}{\rm{ < Li}}_{\rm{2}}^{\rm{ + }}{\rm{ < Li}}_{\rm{2}}^{\rm{ - }}\)
2 \({\rm{Li}}_{\rm{2}}^{\rm{ - }}{\rm{ < Li}}_{\rm{2}}^{\rm{ + }}{\rm{ < L}}{{\rm{i}}_{\rm{2}}}\)
3 \({\rm{L}}{{\rm{i}}_{\rm{2}}}{\rm{ < Li}}_{\rm{2}}^{\rm{ - }}{\rm{ < Li}}_{\rm{2}}^{\rm{ + }}\)
4 \({\rm{Li}}_{\rm{2}}^{\rm{ - }}{\rm{ < L}}{{\rm{i}}_{\rm{2}}}{\rm{ < Li}}_{\rm{2}}^{\rm{ + }}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313696 Assertion :
Fluorine molecule has bond order one.
Reason :
The number of electrons in the antibonding molecular orbitals is two less than that in bonding molecular orbitals.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313697 Which of the following is more stable?

1 \(\mathrm{N}_{2}\)
2 \(\mathrm{O}_{2}\)
3 \(\mathrm{Li}_{2}\)
4 All of these
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CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313694 About the species \(\mathrm{O}_{2}^{+}, \mathrm{O}_{2}^{2-}, \mathrm{O}_{2}, \mathrm{O}_{2}^{-}\)which one of the following statements is correct?

1 \(\mathrm{O}_{2}^{+}\) has the highest bond order and largest bond length
2 \(\mathrm{O}_{2}\) has the highest bond order.
3 The bond order of \(\mathrm{O}_{2}\) equals the average bond orders of \(\mathrm{O}_{2}^{+}\)and \(\mathrm{O}_{2}^{-}\).
4 The sum of bond orders of these species is 1 .
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313695 Stability of the species \({\rm{L}}{{\rm{i}}_{\rm{2}}}{\rm{,Li}}_{\rm{2}}^{\rm{ - }}\,\,{\rm{and}}\,\,{\rm{Li}}_{\rm{2}}^{\rm{ + }}\) increases in the order of :

1 \({\rm{L}}{{\rm{i}}_{\rm{2}}}{\rm{ < Li}}_{\rm{2}}^{\rm{ + }}{\rm{ < Li}}_{\rm{2}}^{\rm{ - }}\)
2 \({\rm{Li}}_{\rm{2}}^{\rm{ - }}{\rm{ < Li}}_{\rm{2}}^{\rm{ + }}{\rm{ < L}}{{\rm{i}}_{\rm{2}}}\)
3 \({\rm{L}}{{\rm{i}}_{\rm{2}}}{\rm{ < Li}}_{\rm{2}}^{\rm{ - }}{\rm{ < Li}}_{\rm{2}}^{\rm{ + }}\)
4 \({\rm{Li}}_{\rm{2}}^{\rm{ - }}{\rm{ < L}}{{\rm{i}}_{\rm{2}}}{\rm{ < Li}}_{\rm{2}}^{\rm{ + }}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313696 Assertion :
Fluorine molecule has bond order one.
Reason :
The number of electrons in the antibonding molecular orbitals is two less than that in bonding molecular orbitals.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313697 Which of the following is more stable?

1 \(\mathrm{N}_{2}\)
2 \(\mathrm{O}_{2}\)
3 \(\mathrm{Li}_{2}\)
4 All of these
NEET DIGITAL LIBRARY
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313694 About the species \(\mathrm{O}_{2}^{+}, \mathrm{O}_{2}^{2-}, \mathrm{O}_{2}, \mathrm{O}_{2}^{-}\)which one of the following statements is correct?

1 \(\mathrm{O}_{2}^{+}\) has the highest bond order and largest bond length
2 \(\mathrm{O}_{2}\) has the highest bond order.
3 The bond order of \(\mathrm{O}_{2}\) equals the average bond orders of \(\mathrm{O}_{2}^{+}\)and \(\mathrm{O}_{2}^{-}\).
4 The sum of bond orders of these species is 1 .
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313695 Stability of the species \({\rm{L}}{{\rm{i}}_{\rm{2}}}{\rm{,Li}}_{\rm{2}}^{\rm{ - }}\,\,{\rm{and}}\,\,{\rm{Li}}_{\rm{2}}^{\rm{ + }}\) increases in the order of :

1 \({\rm{L}}{{\rm{i}}_{\rm{2}}}{\rm{ < Li}}_{\rm{2}}^{\rm{ + }}{\rm{ < Li}}_{\rm{2}}^{\rm{ - }}\)
2 \({\rm{Li}}_{\rm{2}}^{\rm{ - }}{\rm{ < Li}}_{\rm{2}}^{\rm{ + }}{\rm{ < L}}{{\rm{i}}_{\rm{2}}}\)
3 \({\rm{L}}{{\rm{i}}_{\rm{2}}}{\rm{ < Li}}_{\rm{2}}^{\rm{ - }}{\rm{ < Li}}_{\rm{2}}^{\rm{ + }}\)
4 \({\rm{Li}}_{\rm{2}}^{\rm{ - }}{\rm{ < L}}{{\rm{i}}_{\rm{2}}}{\rm{ < Li}}_{\rm{2}}^{\rm{ + }}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313696 Assertion :
Fluorine molecule has bond order one.
Reason :
The number of electrons in the antibonding molecular orbitals is two less than that in bonding molecular orbitals.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313697 Which of the following is more stable?

1 \(\mathrm{N}_{2}\)
2 \(\mathrm{O}_{2}\)
3 \(\mathrm{Li}_{2}\)
4 All of these
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CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313694 About the species \(\mathrm{O}_{2}^{+}, \mathrm{O}_{2}^{2-}, \mathrm{O}_{2}, \mathrm{O}_{2}^{-}\)which one of the following statements is correct?

1 \(\mathrm{O}_{2}^{+}\) has the highest bond order and largest bond length
2 \(\mathrm{O}_{2}\) has the highest bond order.
3 The bond order of \(\mathrm{O}_{2}\) equals the average bond orders of \(\mathrm{O}_{2}^{+}\)and \(\mathrm{O}_{2}^{-}\).
4 The sum of bond orders of these species is 1 .
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313695 Stability of the species \({\rm{L}}{{\rm{i}}_{\rm{2}}}{\rm{,Li}}_{\rm{2}}^{\rm{ - }}\,\,{\rm{and}}\,\,{\rm{Li}}_{\rm{2}}^{\rm{ + }}\) increases in the order of :

1 \({\rm{L}}{{\rm{i}}_{\rm{2}}}{\rm{ < Li}}_{\rm{2}}^{\rm{ + }}{\rm{ < Li}}_{\rm{2}}^{\rm{ - }}\)
2 \({\rm{Li}}_{\rm{2}}^{\rm{ - }}{\rm{ < Li}}_{\rm{2}}^{\rm{ + }}{\rm{ < L}}{{\rm{i}}_{\rm{2}}}\)
3 \({\rm{L}}{{\rm{i}}_{\rm{2}}}{\rm{ < Li}}_{\rm{2}}^{\rm{ - }}{\rm{ < Li}}_{\rm{2}}^{\rm{ + }}\)
4 \({\rm{Li}}_{\rm{2}}^{\rm{ - }}{\rm{ < L}}{{\rm{i}}_{\rm{2}}}{\rm{ < Li}}_{\rm{2}}^{\rm{ + }}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313696 Assertion :
Fluorine molecule has bond order one.
Reason :
The number of electrons in the antibonding molecular orbitals is two less than that in bonding molecular orbitals.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313697 Which of the following is more stable?

1 \(\mathrm{N}_{2}\)
2 \(\mathrm{O}_{2}\)
3 \(\mathrm{Li}_{2}\)
4 All of these
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